Moreover, the absolute values of e.g. O/H (often assumed to be Solar, with the implied variations/uncertainties just stated above) also affect the way that absorption edges from our own Milky Way influence the spectrum; since most of the emission from the IGrM is in the soft band, using the correct Galactic \(n_{\rm H}\)  [1]} as well as the correct chemical composition of the absorbing gas is important for obtaining a robust characterization of the spectral properties of the IGrM.
